Pretty sure Barry Bonds on steroids could whack Mark Hunt with a baseball bat in the head and he'd still keep coming.
Nelson can take a lot of punishment at HW and has good power in his hands. If he lost all of that ****ing fat and fought at 205, he'd be a monster.
I'm always ambivalent about these types of threads. To paraphrase Dent "You either avoid getting punched or live long enough to see yourself become glass jawed". Nobody should lead with their chin or rely on getting cleanly connected in multiple fights. If you don't develop your head movement and boxing guard then you will eventually have your career cut short by an inability to take a punch. Just a fact. Nogueira and Liddell are classic examples of that.
but sometimes it is fun to see a guy getting KOd cuz he thought his chin was granite like this WW bloke who was on TUF some seasons ago who insisted on having a granite chin so he asked one of the 205ers to punch him cleanly on the chin and he fell like a sack of potatoes then after the day was over he said something like this "yeah you had a good punch but i wasnt out" then he answered "you fell like a dead corpse and you where completely out"
Leben vs Terry Martin is such a fun fight to watch. Leben taking bomb after bomb then BOOM! One Crippler left hook later, Martin is out.
Leben has a very good chin but its not even in the same league of the likes of Hunt, Fedor or even Chris lytle